At the start of an expansion? Yes, sure you are a vital and necessary thing
Midway through an expansion? Still needed, a well-geared group might not require you but for the most part nobody's gonna go soloing things
In the last few months of an expansion? Yeah no, your useless. My lock can solo dungeons, the rest of you are warm bodies I need to get valor and we all want the same thing. To smash it and go home
Is it impatient? yes it is, but the simple fact is I can do you job better then you in this particular situation. So sit down, shut up and be a good piece of luggage